The first scientist to determine that the orbits of the planets are ellipses was
A. Kepler.
B. Newton.
C. Ptolemy.
D. Copernicus.
E. Galileo.
Answer: A
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An astronomical telescope has an objective lens with focal length fo and has an eyepiece with focal length fe. A second telescope has objective and eyepiece lenses with half the focal length of the first telescope. Which telescope gives the greater magnification and by what factor?
a. The second telescope gives 4 times the magnification of the first. b. The first telescope gives 4 times the magnification of the second. c. The actual focal lengths must be known to answer this question. d. Both telescopes give the same magnification.
What is the most accurate way to determine the distance to a distant galaxy (a galaxy that is too far away for us to see individual stars)?
A) radar ranging B) parallax C) using Cepheid variables D) using white dwarf supernovae
If we assume space to be infinite, what is the possibility of multiple universes where the laws of physics may be different than those of our universe?
Describe some of the features of Mercury's surface and briefly explain how these features are believed to have formed
What will be an ideal response?